All codes
Service call
SC591
Toner supply motor error (alt)
BPCU / developer
Level B — stop, power-cycle may clear
First check
Same idea as SC332 — bottle packed or supply motor locked.
What it means
Toner supply motor error (alt). Confirm the exact subcode against the FSM for this serial — meaning can shift by generation.
Likely causes
- Same idea as SC332 — bottle packed or supply motor locked.
On-site steps
Parts to have on the truck
- Toner supply motor
- Bottle
Related codes
Confirm the subcode and part number in the FSM for this serial. Raicoh is a field companion, not a replacement for the book.